I'm in agreement with @Joel Bongco that it really depends on your preferences and requirements.A majority of the integrations setup and training the CRM company should be able to help with during the onboarding process and on going support.Feel free to DM or respond here if you'd like to schedule a quick zoomBest of luck!

I'll address your questions from my perspective in order:First - You sign a lease agreement in addition to the airbnb booking.

All agreed that we would much rather use our company as the front man (if you will) and then use a viable agreement/contract to list purpose, profit allocation, rights (including voting) and obligations of persons under agreement, amendment and dissolution criteria, and duration of joint venture. 

Your profile and post mentions Philadelphia and New Jersey.There are unique tax implications between those who live and work in another states as there is a reciprocal agreement between the two states.

Can I add this in the lease agreement?

Two weeks ago, she sent a request to leave and I prepared an agreement so I could acquire a new tenant first.

This is not just a product of how frequently the manager can find guests for your Airbnb, but also what price she is able to charge for the nights rented, and perhaps even more importantly, how much of that rental income ultimately flows to you as the owner.If you sign a guaranteed income agreement with the manager, this amount is set.If you use a shared success (or commission) agreement, the calculations can be trickier.What is the vacation rental manager’s commission rate?

In many cases a simple LLC with an operating agreement can handle what you are trying to achieve.

When I do, I use a written agreement that explains specifically what they will do, who pays for what, the materials to be used, a completion date, etc.

I feel that I’m not legally obligated to reimburse or compensate them anything according to the lease agreement!